[Wowfunhappy]

Snow Leopard doesn't need dark mode—I'm actually not sure what it would look like. The UI makes use of a wide array of tones, many of which are quite dark.

Finder's background is white by default, but you can change it to whatever color you want. TextEdit and iWork use white backgrounds because they're supposed to be printable. iWeb uses mostly dark backgrounds. Most other apps are mostly a neutral gray.

Dark mode is a bandaid to cover up the fact that modern macOS has too little contrast to begin with. You can make Mojave either too light or too dark, but both options suck.

[alblue]

You can go into the accessibility panel in system preferences and increase the contrast and remove transparency, both of which aid readability and interaction.

[Wowfunhappy]

Yes, but it makes the UI look even uglier. :( Whereas the pre-Yosemite design had high contrast and actually looked good.

[Wowfunhappy]

(I meant to say iLife—the whole suite—not iWeb. Not sure how I messed that up.)